submariner: unvalidated endpoint.spec.subnets propagated into wireguard allowedips / ipsec enables traffic hijack
Classification: Severe, Solution: Not Defined, Exploit Maturity: Not Defined, CVSSv3.1: 9.9, CVEs: CVE-2026-66785, Summary: A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all…
CVSS 9.9 CVE-2026-66785 FI